Turbine wheel



(No M COLE,

TURBINE WHEEL. No. 364,804. Patented June 14, 1887.

' a 1 lll l f Hil 2 UNITED STATES PATENT OFFICE.

ASHLEY D. COLE, OF TORONTO, ONTARIO, OAN ADA.

TURBINE WHEEL.

SPECIFICATION forming part of Letters Patent No. 364,804, dated June 14,1887.

- Application filed January 3, 1887. Serial No. 223,173. (No model.)

5 have invented certain new and useful Improvements in Turbine Wheels,of which the following is a specification.

The object of the invention is to provide a step for the turbine wheelwhich may be readily adjusted vertically and removed at will Withoutdisturbing the wheel; and it consists in the peculiar combination andthe novel construction, arrangement, and adaptation of parts,substantially as hereinafter more particularly explained. v

Figure lis aperspective sectional view of the a wheel, showing the formand arrangement of the buckets. Fig. 2 is a plan of the same. Fig. 3 isa sectional elevation of the wheel, showing the adjustable step inposition. Fig. 4 is a perspective detail of the step, and Fig. 5 is aperspective detail of the step'socket.

In the drawings, A represents the buckets, which are made of sheet metalshaped and set in position as indicated in Figs. 1 and 2. The line ofeach bucket, it will be noticed, is vertical for about two-thirds of thedepth of the center B, and is then curved gradually until it reaches thebottom of the center 13, at a short distance from the bucket immediatelynext to it. I

Instead of setting the buckets A so as to radiate from the center of thewheel, each bucket, it will be seen on reference to Fig. 2,

is set on a tangent from the center. Consequently they offer noresistance to the contraction of the cast metal during the process ofits cooling, and therefore the metal will not crack. It will be evidentthat when the buckets are set radially they offer considerableresistance to the shrinking of the top of the cast-metal centerB; butwhen set tangentially the cast metal as it cools and shrinks only bendsthe sheet metal slightly'more tangentially, and thus the cracking of thecast metal is prevented.

O is a bracket forming a socket for the step D, it being bored out asindicated to receive the tapered step D, as shown. bracket 0 is fittedinto a hole made in the frame E, a recess around the said hole beingmade in the said frame E, as indicated, into which recess the flange?)on the socketbracket O fits, screwed holes being made in the said flangeb to receive the screw-bolts F, which fit into holes made in the frameE, and are utilized for the purpose of adjusting the socketbracket 0vertically, so as to elevate the step D as it wears away.

WVhen it becomes necessary to remove and change the step D, I placeblocks of wood between the frame E and bottom of the wheel, when thebolts F may be unscrewed so as to permit the socket-bracket O, with thestep D,

to drop below the frame E, room being of course left below the saidframe so as to permit the withdrawal of the said bracket and itsreplacement by another, the wheel being in the meanwhile supported bythe blocks, lo cated as specified.

What I claim as my invention is The combination, with the frame E,provided with a hole to receive a socket-bracket, and a recess aroundsaid hole, of the bracket O, having tapering socket and flange b, and

inserted in said hole in the frame with the flange b in said recess, thetapering step D in said socket,and the screw-bolts F, engaging screwedholes in said frame and the flange of the bracket, substantially asshown and described, and for the purpose specified.

Toronto, December 11,1886.

A. D. COLE.

In presence of- CHARLES C. BALDWIN, CHAS. H. RICHES.

This sock et-

